Here is the full list of all 38 Monster Monpiece achievements.
Obtained all the achievements!
Got 500 kinds of cards!
300 successful First Crush ♡ rubs!
Si Ku Ork area cleared!
Cleared the game!
Won 100 offline battles!
Irresistible Force
Tokio area cleared!
Won 70 offline battles!
Triggered extreme love 100 times!
Okinava area cleared!
Your Rub P stock has exceeded 10000!
Fukuruko area cleared!
Won 50 offline battles!
100 successful First Crush ♡ rubs!
Got 100 kinds of cards!
Ki Outo area cleared!
Triggered extreme love 50 times!
Ho Kaido area cleared!
Won 30 offline battles!
50 successful First Crush ♡ rubs!
Hollowlo area cleared!
Triggered extreme love 20 times!
Trained for the first time!
Ginuma area cleared!
10 successful First Crush ♡ rubs!
Triggered extreme love!
First successful First Crush ♡ rub!
Won 10 offline battles!
Performed First Crush ♡ rub!
Kunaguva area cleared!
Performed fusion for first time!
Acquired a card for first time!
Won a card battle with 0 damage!
Won a card battle for the first time!
Attacked castle for first time!
Battled for the first time!
Started the game for the first time!